Malicious PDF — malware analysis report

Static analysis result for SHA-256 2321724e7215b09f…

MALICIOUS

PDF

82.7 KB Created: 2021-03-19 10:09:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 90759a35b9f49657833dc84e462594c8 SHA-1: 1783ff53696e18513527401ca345e23e35f919b9 SHA-256: 2321724e7215b09fefba3a844829ddc039e36fa266a473eab1c73f90e6b08226
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://jacksth.ru/strik?utm_term=car+form+lra+revised+11%252F13 PDF link annotation
    • http://idealica-uficiale.website/hearts_in_atlantis_book_vs_movieoqwbz.pdfIn PDF document text
    • http://dream-stat.ru/41231671806e1clx.pdfIn PDF document text
    • http://in-step.shop/keurig_k450_parts1189b.pdfIn PDF document text
    • http://damita.fun/my_positive_self_talk_flowerpabfh.pdfIn PDF document text
    • http://dle-tpl.site/12730556757a2s31.pdfIn PDF document text
    • http://rte-ita.fun/the_forgotten_books_of_eden_downloadv4opo.pdfIn PDF document text
    • https://cdn.sqhk.co/vovomafejuwa/hebidgj/minecraft_ps4_mini_games_lobby_secrets.pdfIn PDF document text
    • http://marinarus.space/bimevaxifig4ikz.pdfIn PDF document text
    • https://cdn.sqhk.co/wuwoxegolewa/hf0jj01/ultimate_off_road_build_shops.pdfIn PDF document text
    • http://cabinetshub.xyz/mujegalujasise5l1w.pdfIn PDF document text
    • https://cdn.sqhk.co/waxobakal/7QgD7ie/legends_of_runeterra_meta_decks_swim.pdfIn PDF document text
    • https://cdn.sqhk.co/xidafigutoxa/agfgcgd/74054232981.pdfIn PDF document text
    • http://sfhgfje5df.xyz/system_engineering_life_cycle_stagesxnx0v.pdfIn PDF document text
    • https://cdn.sqhk.co/lemijexo/fHge7Od/zefamer.pdfIn PDF document text
    • http://trycabinets.xyz/24359747442k6w5o.pdfIn PDF document text
    • http://devlp.club/patricia_highsmith_short_stories2zhw2.pdfIn PDF document text
    • http://nat-fru.space/wesusisudevojikigijuobjdf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/gusule/62122164481.pdfIn PDF document text
    • https://s3.amazonaws.com/jijumupade/squirtle_shiny_form.pdfIn PDF document text
    • https://s3.amazonaws.com/mamukawaxatali/elisa_lam_autopsy_report.pdfIn PDF document text
    • https://s3.amazonaws.com/rawesaragegugar/sikodurapasas.pdfIn PDF document text
    • https://s3.amazonaws.com/gagotaniwipure/the_boy_in_the_striped_pyjamas_book_trailer.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f5ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5EE 4988 bytes
SHA-256: 06cc43a81d33c9f43ee6d9f25e470eb473bee6b5d1d90cb9c855373d880078c3
font_01_sfnt_off000106fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106FC 11208 bytes
SHA-256: 26772ad57e44b87f0a7bbb641f18a02f8169c5be589731256786ef01b6935813
font_02_sfnt_off00012d2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D2D 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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